Stud setting and extracting tool.



'No. 69|,406. Patented Jan. 2|, 1902.

L. H. MORGAN. v STUD. SETTING AND EXTRAGTING TOOL.

(Application filed Jan. 28, 1901.

(No Model.)-

Jf gmoemtoz UNITED STATES PATENT FFICE.

LEW'IS H. MORGAN, OF PLAINFIELD, NEW JERSEY.

STUD SETTING AND EXTRACTl NG TOOL.

SPECIFICATION forming part of Letters Patent N 0. 691,406, dated.January 21, 1902.

Application filed January 28,1901. Serial No. 45,087. (No model.)

To all whom, it may concern:

Be it known that I, Lnwrs H. Moneanga citizen of the United States ofAmerica, residing in Plainfield, Union county, State of New J ersey,have invented certain new and useful Improvements in Stud Setting andExtracting Tools, of which the following is a specification.

My invention relates, broadly, to split screws or nuts, one part beingrigidly held to the supporting-body and the other part being movablelongitudinally of the rigidly-held portion; to means for actuating saidmovable part longitudinally of the body independently of said rigid partto clamp a screw-threaded piece of work or stud to said body with moreor less pressure, according to the work to be done, and to other detailsof improvements and combinations of parts hereinafter described and thenpointed out in the claims.

Reference is to be had to the accompanying drawings, forming parthereof, wherein Figure 1 is a vertical cross-section of a deviceembodying my invention, the parts being shown in the stud-extractingposition. Fig. 2 shows the parts in the stud-setting position, and Fig.3 is a bottom plan View of Fig. 2.

Similar numerals of reference indicate corresponding parts in theseveral views.

1 is a body having a bore shown smooth at one end to receive a half-nut2, that is movable longitudinally of the body 1 and held from rotationindependently of body 1 by any suitable means, such as a groove 2 and ascrew 1. The other end 1 of said body-bore is shown screw-threaded tomesh with a jamscrew 3, the end thereof being adapted to engage the endof the half-nut 2 to actuate said half-nut 2 longitudinally of thebody 1. When the parts are in the position shown in Fig. 2, the body 1and half-nut 2 are then preferably drilled and tapped with screw-threads1 2to mesh with the screw-threads 4 of a stud 4. This construction thusprovides a split nut 2 1, one portion 1 of which is rigidly connectedWith body 1 and the other portion 2 of which is movable longitudinallyindependently of its correspondingly-threaded portion 1.

Other means for actuating part 2 longitu dinally of body 1 andindependently of part 2 may of course be used; but I have selected thejam-screw 3 as being the simplest and most efiective. To increase therelative pressure of jam-screw 3 and the threads 1 2 4, I havepreferably shown the screw-threads of said jam-screw of finer pitch thanthose of the stud 4.

The operation of the parts is as follows: The parts being in therelative positions illustrated in Fig. 2, a stud 4 canbe set in atappedhole 5 in work 5 in the usual manner by the friction of its end 4engaging the end surfaces l 2* of the split nuts 1 2; but should thestud at refuse to go down to the required depth in hole 5 (see Fig. 1)after the operator has tried every means in his power to complete theproper setting he will then be unable to get the stud out withoutdestroying it and probably redrilling and retapping the hole to makeroom for a new properlyfitting stud. With the device herein illustratedand described the operator can increase the frictional grip of thescrew-threads 1 2 4: by tightening the jam-screw 3, which will move thehalf-nut 2 longitudinally of body 1 independently of half-nut1, andthereby create sufficient friction of the threads 1 2 4 to insure thebacking out of the stud without injury to the stud or the work, andthereby avoiding the time and expense wasted by the usual inability toback the stud out Without destroying it.

Having now described my invention, what I claim is- 1. A body having arigidly-carried internally-screw-threaded portion, and alongitudinallymovable internallyscrewthreaded portion, saidscrew-threaded portions being adapted to coact to mesh with a stud, andmeans carried by the body to actuate said movable screw-threaded portionlongitudi nally of the body independently of said rigidly-carriedscrew-threaded portion, substantially as described.

2. A body having a rigidly-carried internally-screw-threaded portion anda longitudinally movable internally screw threaded portion, saidscrew-threaded portions being adapted to coact to mesh with a stud, anda jam-screw carried by the body in line with and adapted to actuate saidmovable internally-screw-threaded portion, substantially as described.

LEWIS H. MORGAN. Witnesses:

ANDREW VANDERBEOK, Josnrn SATTELs.

